Ref: Radar Detector Detectors, and so on...
Radar detectors are illegal in most of Canada. My friend is a cop, and rather than get too involved in the radar detector detector detecors game, he tells me his low tech method to confiscate units from cars that have detectors. He'll sit well back of a dark on-ramp at night, out of sight and let cars pass by without anyone ever seeing him. His radar and all car lights are off. If a car goes by obviously over the limit he'll let it get well past and then flick the radar on, doesn't matter where. If the car keeps on going, he lets it go. If he sees brake lights off in the distance, he is 100% certain the unit has a radar detector and goes to get it. The following conversation is usually something like this.
"I'm confiscating your radar decetor and giving you a fine."
"Sir, I don't have one."
"I know you do, and this is your last chance to give it to me before I start ripping pieces off of you car to find it."
"Officer, I swear I don't have one."
"Step out of the car."
After pulling one or two generic pieces of crap off of buddy's dash they hand it over. It's dangerous to speed in low traffic areas at night, which is kind of why you would want one in the first place, I would think.